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Finding the Fourth Proportional to 1,011.07, 1,395.34 and 674.39

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Solution

The fourth proportional to 1,011.07, 1,395.34 and 674.39 is: 930.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.07 : 1,395.34 = 674.39 : x
  2. Step 2: Convert to fraction form
    1,011.07/1,395.34 = 674.39/x
  3. Step 3: Cross multiply
    1,011.07x = 1,395.34 × 674.39
  4. Step 4: Simplify right side
    1,011.07x = 940,999.97
  5. Step 5: Solve for x
    x = 940,999.97/1,011.07
  6. Step 6: Final answer
    x = 930.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.